Fig 3. The average probability that a grid cell (500x500 m) catches fire per year as a function of tree cover.

Below each figure the corresponding frequency of each tree cover class of 1% is given. A. All tropics, B. South America, C. Africa and D. Australia and Asia. Fitted line with the best AIC: ${\mathrm{P}}_{\mathrm{f}\mathrm{i}\mathrm{r}\mathrm{e}}\left(\mathrm{T}\right)=\mathrm{p}1\frac{{\mathrm{T}}^{{\mathrm{p}}_3}}{{\mathrm{T}}^{{\mathrm{p}}_3}+{{\mathrm{p}}_2}^{{\mathrm{p}}_3}}\frac{{{\mathrm{p}}_4}^{\mathrm{p}5}}{{\mathrm{T}}^{{\mathrm{p}}_5}+{p_4}^{\mathrm{p}5}}$. For parameters see S1 Table. See S2 Table for the precise ranges in tree cover where the fire frequency drops.